There are few things in this world--dental floss, In-N-Out Burger and the TSA come to mind--that equalize the wide gap between the luxe lives of celebrities and those of us regular people. Theme park rides, it seems, should be added to that list. Six Flags Great America just released some pics of Katy Perry screaming and laughing on several roller coasters, and she's not alone. Check out these other stars who aren't afraid to go bananas at a good ol' fashioned theme park. (Ariel Alexovich, RedEye)